package com.sky.interceptor;

import com.fasterxml.jackson.databind.ser.Serializers;
import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpStatus;
import org.apache.ibatis.logging.stdout.StdOutImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验令牌的拦截器
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        log.info("拦截到了请求，{}",request.getRequestURL().toString());
        //判断当前拦截到的是Controller的方法还是其他资源
//        if (!(handler instanceof HandlerMethod)) {
//            //当前拦截到的不是动态方法，直接放行
//            return true;
//        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getAdminTokenName());

        //2、判断令牌是否存在，若不存在，则不放行-401
        if(!StringUtils.hasLength(token)){
            log.info("令牌为空，响应401");
            response.setStatus(HttpStatus.SC_UNAUTHORIZED);
            return false;
        }
        //3.校验令牌，如果令牌校验失败，则不放行-401
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
            Long empId = Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID).toString());
            log.info("当前员工id：", empId);
            BaseContext.setCurrentId(empId);
        } catch (Exception ex) {
            //不通过，响应401状态码
            log.info("令牌非法 响应401");
            response.setStatus(401);
            return false;
        }
        //5、通过，放行
        return true;
    }
}
